20021201002031 has 2 divisors, whose sum is σ = 20021201002032. Its totient is φ = 20021201002030.

The previous prime is 20021201002027. The next prime is 20021201002081. The reversal of 20021201002031 is 13020010212002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021201002031 - 2² = 20021201002027 is a prime.

It is a super-2 number, since 2×20021201002031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021201001997 and 20021201002015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021201002081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010600501015 + 10010600501016.

It is an arithmetic number, because the mean of its divisors is an integer number (10010600501016).

Almost surely, 2^{20021201002031} is an apocalyptic number.

20021201002031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021201002031 is an equidigital number, since it uses as much as digits as its factorization.

20021201002031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021201002031 its reverse (13020010212002), we get a palindrome (33041211214033).

The spelling of 20021201002031 in words is "twenty trillion, twenty-one billion, two hundred one million, two thousand, thirty-one".